Owner's Manual
Page 23
...affecting an external MIDI device. While holding down the [DEMO/SONG] and [GRAND PIANO/VOICE] buttons, press the C#6 key. The P70 also transmits MIDI control change information when the pedal or other MIDI device, causing the same numbered voice to MIDI Data Format on the... other "control" settings received from an external keyboard or other appropriate controls are operated. Default setting: ON Control Change ON/OFF Normally the P-70 will respond to MIDI control change data reception and transmission so that voices can be operated without affecting the external MIDI device.
...affecting an external MIDI device. While holding down the [DEMO/SONG] and [GRAND PIANO/VOICE] buttons, press the C#6 key. The P70 also transmits MIDI control change information when the pedal or other MIDI device, causing the same numbered voice to MIDI Data Format on the... other "control" settings received from an external keyboard or other appropriate controls are operated. Default setting: ON Control Change ON/OFF Normally the P-70 will respond to MIDI control change data reception and transmission so that voices can be operated without affecting the external MIDI device.